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We are Part of the Thomas Armstrong Group
All of the products in our range are suitable for use in meeting the UK structural Building Regulations and codes currently in use:
Selecting block strength to storey height
The following rules of thumb for selecting block strength to storey height is taken from Approved Document A of the Building Regulations England & Wales:
Notes
Characteristic Compressive Strength, fk
(of selected aggregate block types, 440mm long x 215mm high)
Mean Compressive strength of block, N/mm²
Block Size
3.6
7.3
10.4
15.0
17.5
22.5
Solid (Group 1) blocks using designation III (M4) mortar
100mm
3.5
5.7
7.4
9.5
10.6
12.6
140mm
3.4
5.5
7.0
9.1
10.1
12.1
215mm
3.1
5.1
6.5
8.4
9.4
11.2
Cellular or Hollow (Group 2) blocks using designation iii (M4) mortar
140mm
3.1
5.1
6.6
-
-
-
215mm
2.9
4.7
6.1
-
-
-
Blocks Laid Flat using designation iii (M4) mortar
100mm
2.4
3.9
5.0
6.4
7.1
8.5
Other Physical Properties of our blocks (all types)
Physical Property
Modulus of Elasticity (E)
E = (-520 + 4.7pdry) ± 500 N/mm² where p is the block dry density
Coefficient of linear expansion
8 x 10-6 K
Specific Heat Capacity
1.05 kJ / kg / K